The Planning and Development Department processes and issues various types of permits and approvals in unincorporated McHenry County.

If your property is located in a village or city, please contact their office. A list of communities and contacts may be found here.



Applying for a permit?   Click Here for permit applications and information.


December 1, 2014: ​The newly revised Stormwater Management Ordinance (SMO) is effective. 

The December 1, 2014 SMO amendments include revised definitions for numerous terms including Regulated Development and Flood Prone Area, a broader scope of activities classified as Exempted Development, addition of General Permits for specific types of development, revisions to performance standards and submittal requirements with respect to the major and minor stormwater systems of a development, modified requirements in the building protection and public health protection standards, inclusion of Category V wetland impact for temporary impacts to Isolated Waters of McHenry County, and revised requirements for buffer areas.  Please note this is not a comprehensive list of all modifications to the SMO.


October 22, 2014:  The Unified Development Ordinance (UDO) is effective. 

The UDO updates and integrates previous development ordinances, including those regulating zoning, subdivisions, and signs, into a single comprehensive document.

Click here for Calendars, Meeting Agendas and Minutes 


Looking for Zoning?  PlanDev Viewer The County's interactive map has zoning information for unincorporated areas.

Additional data you can access includes: current land use, comprehensive-planned land use, agricultural protection areas, soils, water resources, flood hazard areas, parcel data, and more.

Other maps are available on the County's maps page

Department Mission: 

To direct the orderly development of McHenry County, through the development, implementation, and enforcement of the plans, ordinances, and policies of the County Board, in a manner that assures the health, safety, and welfare of county residents; protects natural and historic resources; and, encourages a harmonious relationship between people, land use, and the environment. 



Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.